diff --git a/shim/runtime/v2/rune/v2/rune.go b/shim/runtime/v2/rune/v2/rune.go
index 0e0ee21b809c2888fa37c3a94fc62d1a72f290ec..48821d68dc67c9a18743a538716e489aa3217d99 100644
--- a/shim/runtime/v2/rune/v2/rune.go
+++ b/shim/runtime/v2/rune/v2/rune.go
@@ -138,7 +138,7 @@ func getCarrierKind(bundlePath string) (found bool, value rune.CarrierKind, err
 	}
 	v, ok := config.GetEnv(spec, constants.EnvKeyRuneCarrier)
 	if !ok {
-		return
+		return true, rune.Empty, nil
 	}
 	value = rune.CarrierKind(v)
 	if value == rune.Occlum || value == rune.Graphene || value == rune.Empty || value == rune.Skeleton {